US3728215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aminopalyamide{13 acrylamide{13 polyaldehyde resins employing an alpha, beta-unsaturated monobasic carboxylic acid or ester to make the aminopolyamide and their utility as wet and dry strengthening agents in papermaking
Assignee: Hercules LLC
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Filing: 1971-03-12
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Granted: 1973-04-17
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Expires: 1991-03-12
Abstract
Abstract Disclosed are novel aminopolyamide-acrylamide-polyaldehyde resins useful in the paper making art to enhance the wet and dry strength of paper. The aminopolyamide results from the condensation of a polyalkylene polyamine with an alpha, betaunsaturated monobasic carboxylic acid or ester.
Inventors
- 👤 H Espy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:00
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/54; D21H17/55; C; C08; C08G; C08G69/00; C08G69/48
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
43 words
The product of claim 1 wherein the aminopolyamide condensate is reacted with from about 0.5 to about 3.0 moles of an epoxide, selected from the groups consisting of epihalohydrin and diepoxides, per mole of aminopolyamide, before it is reacted with the unsaturated amide.
Claim 2
Dependent Claim
31 words
an amount of unsaturated amide, selected from the group consisting of acrylamide and lower alkyl substituted acrylamides, sufficient to react with substantially all of the amine groups in the aminopolyamide and
Claim 3
Dependent Claim
31 words
an amount of unsaturated amide, selected from the group consisting of acrylamide and lower alkyl substituted acrylamides, sufficient to react with substantially all of the amine groups in the aminopolyamide and
Claim 4
Dependent Claim
34 words
reacting the resulting aminopolyamide-unsaturated amide adduct with from about 0.05 to about 5.0 moles of an organic compound containing at least two free aldehyde groups per mole of unsaturated amide present in said adduct.
Claim 5
Dependent Claim
34 words
reacting the resulting aminopolyamide-unsaturated amide adduct with from about 0.05 to about 5.0 moles of an organic compound containing at least two free aldehyde groups per mole of unsaturated amide present in said adduct.
Claim 6
Dependent Claim
21 words
The product of claim 1 wherein the aminopolyamide is the reaction product of the condensation reaction of diethylenetriamine with methyl acrylate.
Claim 7
Dependent Claim
21 words
The product of cLaim 1 wherein the aminopolyamide is the reaction product of the condensation reaction of tetraethylenepentamine with methyl acrylate.
Claim 8
Dependent Claim
21 words
The product of claim 1 wherein the aminopolyamide is the reaction product of the condensation reaction of diethylenetriamine with ethyl crotonate.
Claim 9
Dependent Claim
18 words
The product of claim 1 wherein the organic compound containing at least two free aldehyde groups is glyoxal.
Claim 10
Dependent Claim
18 words
The product of claim 1 wherein the organic compound containing at least two free aldehyde groups is glutaraldehyde.
Claim 11
Dependent Claim
12 words
The process of preparing an aminopolyamide-acrylamide-polyaldehyde resin which comprises the steps of
Claim 12
Dependent Claim
43 words
The process of claim 8 wherein the aminopolyamide condensate is reacted with from about 0.5 to about 3.0 moles of an epoxide, selected from the group consisting of epihalohydrins and diepoxides, per mole of aminopolyamide, before it is reacted with the unsaturated amide.
Claim 13
Dependent Claim
13 words
The process of claim 8 wherein the polyalkylene polyamine is a polyethylene polyamine.
Claim 14
Dependent Claim
16 words
The process of claim 8 wherein the alpha, beta-unsaturated monobasic carboxylic acid ester is methyl acrylate.
Claim 15
Dependent Claim
16 words
The process of claim 8 wherein the alpha, beta-unsaturated monobasic carboxylic acid ester is ethyl crotonate.
Claim 16
Dependent Claim
11 words
The process of claim 8 wherein the unsaturated amide is acrylamide.
Claim 17
Dependent Claim
18 words
The process of claim 8 wherein the organic compound containing at least two free aldehyde groups is glyoxal.
Claim 18
Dependent Claim
30 words
A paper treating composition comprising an aqueous solution of up to 15 percent solids by weight based on the weight of the water of the aminopolyamide-acrylamide-polyaldehyde resin of claim 1.
Claim 19
Dependent Claim
29 words
Paper treated with from about 0.05 to 5 percent by weight based on the weight of the paper of the aminopolyamide-acrylamide-polyaldehyde resin of claim 1 to impart wet strength.
Claim 20
Dependent Claim
46 words
The process of treating paper to impart wet strength which comprises treating said paper with from about 0.05 percent to about 5 percent by weight based on the weight of the paper of the aminopolyamide-acrylamide-polyaldehyde resin of claim 1 and allowing the treated paper to dry.
Claim 21
Dependent Claim
16 words
The process of claim 17 wherein said treating is conducted during the formation of said paper.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |